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Coronavirus: why is it an international emergency? 3:40
(CNN) - The U.S. Centers for Disease Control and Prevention is ordering a 14-day federal quarantine for almost 200 Americans who recently returned from Wuhan, China.
The 195 Americans, many of them diplomats and their families, flew from Wuhan to California on Wednesday. They have remained at the March Air Reserve Base since then under a three-day voluntary quarantine.
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Several other countries, such as France, South Korea and Australia have ordered that their returning citizens from Wuhan be quarantined for 14 days.
On Friday morning, a CDC adviser told CNN that the agency should consider extending the three-day quarantine because other countries are doing the same, and due to a report published Thursday night in the New England Journal. of Medicine that shows that infected people can transmit the virus before they develop symptoms.
In that study, there were five cases of asymptomatic transmission of the Wuhan virus in one group. A woman in Shanghai was infected by one of her parents, who had no symptoms; that woman flew to Germany and, as she was asymptomatic, she transmitted the virus to two colleagues; one of those colleagues, although healthy, transmitted the virus to two other coworkers.
Wuhan coronavirus